Intersecting Signals

Is it possible for two 900 Mhz signals to interfere with each other even if
they are broadcast in differernt directions? For example, signal A crosses
signal B but the end user of signal A is shielded from signal B. If our user
is not actually receiving interference from but the signal crosses a source
another 900 Mhz broadcast can that signal cause disruption to the customer?

I hope I kept that straight.